/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.spi.communication.tcp.internal;

import org.apache.ignite.internal.util.typedef.internal.U;

/**
 * Round robin connection policy.
 */
public class RoundRobinConnectionPolicy implements ConnectionPolicy {
    /** Config. */
    private final TcpCommunicationConfiguration cfg;

    /**
     * @param cfg Config.
     */
    public RoundRobinConnectionPolicy(TcpCommunicationConfiguration cfg) {
        this.cfg = cfg;
    }

    /** {@inheritDoc} */
    @Override public int connectionIndex() {
        return (int)(U.safeAbs(Thread.currentThread().getId()) % cfg.connectionsPerNode());
    }
}
